Saco Defense Inc, Saco, ME manufactures machine guns and cannon barrels and operated an unlined surface impoundment containing oily waste and solvent waste from 1970 to 1983. Significant remedial work has been performed at the site in recent years. EPA is hopeful that by the year 2000 data will be available indicating that human exposures are not occurring and that contaminants in groundwater are clearly delineated and controlled.